Transgenic mice expressing a mutant keratin 10 gene reveal the likely genetic basis for epidermolytic hyperkeratosis

E. Fuchs, R. A. Esteves, P. A. Coulombe

Research output: Contribution to journalArticle

Abstract

Epidermolytic hyperkeratosis (EH; previously called bullous congenital ichthyosiform erythroderma) is an autosomal dominant skin disease of unknown etiology, affecting ≃1 out of 300,000 people. It is typified by hyperkeratotic scaliness, blistering due to cytolysis within suprabasal epidermal cells, and hyperproliferation in basal cells. Histologically, EH epidermis exhibits a thickened stratum corneum and granular layer, with enlarged and irregular-shaped cells. Ultrastructurally, only suprabasal layers are affected, with three major aberrancies: (i) tonofilament clumping, (ii) nuclei and keratohyalin granules of irregular shape and size, and (iii) cell degeneration. We have discovered that transgenic mice expressing a mutant keratin 10 gene have the EH phenotype, thereby suggesting that a genetic basis for human EH resides in mutations in genes encoding suprabasal keratins K1 and K10. In addition, we show that (i) stimulation of basal cell proliferation can arise from a defect in suprabasal cells, and (ii) distortion of nuclear shape or aberrations in cytokinesis can occur when an intermediate filament network is perturbed.

Original languageEnglish (US)
Pages (from-to)6906-6910
Number of pages5
JournalProceedings of the National Academy of Sciences of the United States of America
Volume89
Issue number15
DOIs
StatePublished - Aug 17 1992

Keywords

  • epidermis
  • keratin
  • nuclear structure
  • skin disease

ASJC Scopus subject areas

  • General

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